142 lines
5.8 KiB
Text
142 lines
5.8 KiB
Text
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# RUN: llc --run-pass=livedebugvalues %s -o - -experimental-debug-variable-locations | FileCheck %s --check-prefixes=CHECK
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# Test that we accurately track variables through transfers and clobbers.
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# In this test case, the value of "b" is found in $rax. From there it is moved
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# to $r15, $rax is killed, the value is moved back from $r15 into $rax again,
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# and then $r15 is killed. Throughout this, we should track "b" and end up with
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# DBG_VALUEs pointing to $rax, then $r15, then $rax again.
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# CHECK-LABEL: bb.0.entry:
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# CHECK: DBG_VALUE $rax,
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# CHECK: $r15 = MOV64rr
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## Technically it's correct to insert the DBG_VALUE for $r15 either immediately
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## after the move to $r15 or immediately after $rax is clobbered, but no later.
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# CHECK: DBG_VALUE $r15,
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# CHECK: $rax = LEA64r
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# CHECK: $rax = MOV64rr
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## Again, the DBG_VALUE can come either after the copy to $rax or the kill of
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## $r15, but no later.
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# CHECK: $r15 = LEA64r
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# CHECK: DBG_VALUE $rax,
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# CHECK: RET64
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--- |
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; ModuleID = 'test.cpp'
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source_filename = "test.cpp"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: mustprogress nofree norecurse nosync nounwind readnone willreturn uwtable
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define dso_local noundef i64 @_Z3fooxx(i64 noundef %a, i64 noundef %b) local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i64 %a, metadata !12, metadata !DIExpression()), !dbg !16
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call void @llvm.dbg.value(metadata i64 %b, metadata !13, metadata !DIExpression()), !dbg !16
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%add = add nsw i64 %b, %a, !dbg !17
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call void @llvm.dbg.value(metadata i64 %add, metadata !14, metadata !DIExpression()), !dbg !16
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%mul17 = sub i64 %a, %b, !dbg !18
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%sub = mul i64 %add, %mul17, !dbg !18
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call void @llvm.dbg.value(metadata i64 %sub, metadata !15, metadata !DIExpression()), !dbg !16
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%add2 = add nsw i64 %sub, %add, !dbg !19
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ret i64 %add2, !dbg !20
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}
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; Function Attrs: nocallback nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 15.0.0 (https://github.com/llvm/llvm-project.git 44673278e029d7a6f56c8a3177247026b831720f)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.cpp", directory: "/home/stozer/dev/llvm-project-build", checksumkind: CSK_MD5, checksum: "1e1c19354b0e967af705e204e8740d56")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"uwtable", i32 2}
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!6 = !{!"clang version 15.0.0 (https://github.com/llvm/llvm-project.git 44673278e029d7a6f56c8a3177247026b831720f)"}
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!7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooxx", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10, !10}
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!10 = !DIBasicType(name: "long long", size: 64, encoding: DW_ATE_signed)
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!11 = !{!12, !13, !14, !15}
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!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 1, type: !10)
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!14 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 2, type: !10)
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!15 = !DILocalVariable(name: "d", scope: !7, file: !1, line: 3, type: !10)
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!16 = !DILocation(line: 0, scope: !7)
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!17 = !DILocation(line: 2, column: 19, scope: !7)
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!18 = !DILocation(line: 3, column: 23, scope: !7)
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!19 = !DILocation(line: 4, column: 12, scope: !7)
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!20 = !DILocation(line: 4, column: 3, scope: !7)
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...
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---
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name: _Z3fooxx
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alignment: 16
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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failedISel: false
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tracksRegLiveness: true
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hasWinCFI: false
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callsEHReturn: false
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callsUnwindInit: false
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hasEHCatchret: false
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hasEHScopes: false
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hasEHFunclets: false
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failsVerification: false
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tracksDebugUserValues: true
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debugInstrRef: true
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registers: []
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liveins:
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- { reg: '$rdi', virtual-reg: '' }
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- { reg: '$rsi', virtual-reg: '' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 0
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offsetAdjustment: 0
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maxAlignment: 1
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adjustsStack: false
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hasCalls: false
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stackProtector: ''
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functionContext: ''
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maxCallFrameSize: 0
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cvBytesOfCalleeSavedRegisters: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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hasTailCall: false
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localFrameSize: 0
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savePoint: ''
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restorePoint: ''
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fixedStack:
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- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
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callee-saved-register: '$r15', callee-saved-restored: true, debug-info-variable: '',
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debug-info-expression: '', debug-info-location: '' }
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stack: []
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callSites: []
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debugValueSubstitutions:
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- { srcinst: 1, srcop: 0, dstinst: 3, dstop: 0, subreg: 0 }
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constants: []
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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liveins: $rdi, $rsi
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renamable $rax = LEA64r renamable $rsi, 1, renamable $rdi, 0, $noreg, debug-instr-number 3, debug-location !17
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DBG_VALUE $rax, $noreg, !13, !DIExpression(), debug-location !17
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$r15 = MOV64rr killed $rax, debug-location !16
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renamable $rax = LEA64r renamable $rdi, 1, $noreg, 12, $noreg, debug-location !16
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$rax = MOV64rr killed $r15, debug-location !16
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renamable $r15 = LEA64r renamable $rdi, 1, $noreg, 12, $noreg, debug-location !16
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RET64 $r15, debug-location !20
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...
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